A 47-year old Iraqi refugee is in federal custody Saturday in connection with an explosion at a Social Security office in Casa Grande.

A source close to the investigation says he’ll likely face a litany of federal and state explosive and arson charges on Monday.

“I’m positive in my heart and my soul he had nothing to do with this,” said Swannee Welsh

Welsh believes her neighbor, Abdul Latif Aldosary is being unfairly targeted. She says he’s a refugee from Iraq.

“I’ve never seen him with a match even, he doesn’t drink, doesn’t smoke, he doesn’t move, he doesn’t go to the mosque,” said Welsh.

But Saturday, federal agents were still searching Aldosary’s home at 47th Street and Lemon in Coolidge.

The 47-year old is being held in connection with an explosion at the Social Security office in Casa Grande Friday morning.

Investigators believe someone threw an explosive out a car window, causing the entry door to become blackened and charred.

The office was closed and no one was hurt but the blast shook those nearby.

“He was just in that neighborhood because he goes to unemployment offices and other government buildings over there but he hasn’t any problems against America; he’s very thankful he got to be a refuge somewhere,” said Welsh.

Friday evening, dozens of homes near where Aldosary lives were evacuated as a precaution as agents served a search warrant.

“It’s kind of a surprise, wouldn’t expect a neighbor across the street to be involved in something like that,” said Jerry Vining, Aldosary’s neighbor.

“I’ll be the most stunned person if it turns out he did something like that,” said Welsh.

Aldosary has served time for aggravated harassment after he threatened an employer who wasn’t giving him enough hours.

FOX 10 spoke with that employer Saturday and they say Aldosary made threatening calls and sent letters, but none mentioned explosives.